Answer: Festival Grass Cordyline will remain evergreen in zones 9 (20 to 30 F) and higher. Your gardening in zone 7 so it will die back in the winter time. You can plant it in the ground and mulch over the top of the plant in the winter, or plant it in a pot and sink the pot into the ground in late winter; after the tops die down, mulch over the container, just as you would the soil. Best wishes with your Cordyline!
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